What an expense ratio actually costs you over 25 years

Every mutual fund charges you for running it. That charge is the expense ratio — a percentage of the money you have invested, taken every year, whether the fund goes up or down.

It is quoted small. A fund might say 0.2%, another 1.6%. On ₹1,00,000 that is the difference between ₹200 and ₹1,600 in a year, which does not sound like the sort of thing that changes a life.

It compounds, though — and it compounds against you, every year, on a balance that is itself growing.

Where it is deducted from

You never see it leave your account. It is taken out of the fund’s assets before the NAV is published, which means the return you see is already net of the fee. That invisibility is exactly why it goes unexamined.

SEBI caps the total expense ratio, and the cap varies by fund category and by how large the scheme is. Within that cap, what a fund charges is its own decision.

What a 1.4% gap costs over 25 years

Take two funds holding the same things and earning the same gross return. One charges 0.2%, the other 1.6%. Here is ₹10,000 a month into each.

After	0.2% fund	1.6% fund	Difference
10 years	₹24.3 L	₹22.6 L	₹1.7 L
20 years	₹90.1 L	₹77.5 L	₹12.6 L
25 years	₹1.65 Cr	₹1.37 Cr	₹28 L

Assumptions. ₹10,000 invested at the start of every month, 12% a year gross nominal return before fees, the fee reducing the realised return, starting from zero, no withdrawals, no tax. This is an illustration of how a fee compounds — not a forecast, and not a claim about any specific fund. Real returns vary year to year and can be negative.

Twenty-eight lakh is not a rounding error. It is a house deposit, or several years of retirement spending, handed over for a service that in an index fund’s case is largely automated.

Direct versus regular plans

Every scheme has two versions. The regular plan pays a commission to whoever sold it to you. The direct plan does not, and its expense ratio is lower by roughly that commission.

Same fund, same manager, same holdings — the gap between the two is what distribution costs you, expressed as a number you can look up.

What to check before you invest

The expense ratio is printed on every scheme’s factsheet and on the AMC’s website. Compare the direct plan against the regular plan of the same fund, and compare like with like: an index fund’s ratio is not meaningfully comparable to an actively managed small-cap fund’s.

A lower fee is not the only thing that matters. It is, however, the only thing on the list you can know in advance with certainty.